Question: Until when did Ernest Shackleton hold the record for having traveled the farthest South?
Paraphrase: When did Ernest Shackleton's record for traveling farthest Soutn get broken?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q957543 p:P1000 ?s . ?s ps:P1000 wd:Q2342357 . ?s pq:P582 ?value}